Daruma++ bolts
DARUMA bolts are used with Honjo fenders to mount the fender to the bicycle frame. Mark Vande Kamp is building a rack for his bike and the rack needs to mount to the same point as the fenders. A goal is to make the rack remove with just a couple of bolts. I made these replacement Daruma bolts which have an extra threaded portion for holding the rack. There is a good photo of a normal Daruma bolt here (linked from Jitensha's page on Honjo fenders):
http://www.jitensha.com/eng/images/lngshrtdrmascrws.jpg
It is a pretty good simple lathe project, so I thought it would be a good thing to document. It has facing, turning and drilling and uses both the 3-jaw and 4-jaw chuck.
The bolt is made of 303 (free machining) stainless steel. This was my first experience using it, it machines pretty nicely.
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This is the first bolt that I made, shown as a preview of what we are making in this series.
At the bottom it has a M5 male thread which goes into the frame. There is a cross-hole that the fender stay goes into. The stay is secured with a special washer that isn't shown here. At the other end there is a M5 female hole that the rack mounts to. This is what makes it different from a normal Daruma bolt.
